US11706970B2 - Polymer, coating composition comprising same, and organic light emitting device using same - Google Patents
Polymer, coating composition comprising same, and organic light emitting device using same Download PDFInfo
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- US11706970B2 US11706970B2 US17/047,261 US201917047261A US11706970B2 US 11706970 B2 US11706970 B2 US 11706970B2 US 201917047261 A US201917047261 A US 201917047261A US 11706970 B2 US11706970 B2 US 11706970B2
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- 229920000642 polymer Polymers 0.000 title claims abstract description 131
- 239000008199 coating composition Substances 0.000 title claims abstract description 84
- 239000000126 substance Substances 0.000 claims abstract description 138
- 239000011368 organic material Substances 0.000 claims description 121
- 239000000178 monomer Substances 0.000 claims description 91
- 125000003118 aryl group Chemical group 0.000 claims description 63
- 238000002347 injection Methods 0.000 claims description 61
- 239000007924 injection Substances 0.000 claims description 61
- 238000012546 transfer Methods 0.000 claims description 49
- 125000000217 alkyl group Chemical group 0.000 claims description 38
- 125000001072 heteroaryl group Chemical group 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 31
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims description 18
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 claims description 14
- 125000000609 carbazolyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 claims description 13
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 10
- 229910052739 hydrogen Inorganic materials 0.000 claims description 10
- 239000001257 hydrogen Substances 0.000 claims description 10
- ICPSWZFVWAPUKF-UHFFFAOYSA-N 1,1'-spirobi[fluorene] Chemical group C1=CC=C2C=C3C4(C=5C(C6=CC=CC=C6C=5)=CC=C4)C=CC=C3C2=C1 ICPSWZFVWAPUKF-UHFFFAOYSA-N 0.000 claims description 9
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 claims description 9
- 125000003545 alkoxy group Chemical group 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 7
- 125000005843 halogen group Chemical group 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 125000004957 naphthylene group Chemical group 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
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- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 claims description 5
- 125000002529 biphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C12)* 0.000 claims description 5
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 5
- 229910052805 deuterium Inorganic materials 0.000 claims description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 125000003107 substituted aryl group Chemical group 0.000 claims 1
- 239000010410 layer Substances 0.000 description 230
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- -1 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 description 80
- 239000000463 material Substances 0.000 description 76
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- 239000002904 solvent Substances 0.000 description 62
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 57
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 46
- 230000015572 biosynthetic process Effects 0.000 description 42
- 238000003786 synthesis reaction Methods 0.000 description 40
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- 125000001424 substituent group Chemical group 0.000 description 24
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 23
- 238000003820 Medium-pressure liquid chromatography Methods 0.000 description 20
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 20
- MFRIHAYPQRLWNB-UHFFFAOYSA-N sodium tert-butoxide Chemical compound [Na+].CC(C)(C)[O-] MFRIHAYPQRLWNB-UHFFFAOYSA-N 0.000 description 19
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- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 8
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 8
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- 239000003999 initiator Substances 0.000 description 8
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- 125000002950 monocyclic group Chemical group 0.000 description 8
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 7
- 229910000027 potassium carbonate Inorganic materials 0.000 description 7
- 238000004528 spin coating Methods 0.000 description 7
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- 125000005264 aryl amine group Chemical group 0.000 description 6
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- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 6
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- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 5
- 125000003282 alkyl amino group Chemical group 0.000 description 5
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- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 4
- UJOBWOGCFQCDNV-UHFFFAOYSA-N 9H-carbazole Chemical compound C1=CC=C2C3=CC=CC=C3NC2=C1 UJOBWOGCFQCDNV-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 239000010405 anode material Substances 0.000 description 4
- FJDQFPXHSGXQBY-UHFFFAOYSA-L caesium carbonate Chemical compound [Cs+].[Cs+].[O-]C([O-])=O FJDQFPXHSGXQBY-UHFFFAOYSA-L 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 4
- 239000013256 coordination polymer Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
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- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
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- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 3
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- 229910052799 carbon Inorganic materials 0.000 description 3
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- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 3
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- 229920000553 poly(phenylenevinylene) Polymers 0.000 description 3
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- UWRZIZXBOLBCON-VOTSOKGWSA-N (e)-2-phenylethenamine Chemical class N\C=C\C1=CC=CC=C1 UWRZIZXBOLBCON-VOTSOKGWSA-N 0.000 description 2
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- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 description 2
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- 125000001973 tert-pentyl group Chemical group [H]C([H])([H])C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 2
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- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 2
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- 238000004544 sputter deposition Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 125000003011 styrenyl group Chemical group [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 125000005504 styryl group Chemical group 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 150000003462 sulfoxides Chemical class 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229940042055 systemic antimycotics triazole derivative Drugs 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000001113 thiadiazolyl group Chemical group 0.000 description 1
- 125000001544 thienyl group Chemical group 0.000 description 1
- 229930192474 thiophene Natural products 0.000 description 1
- IBBLKSWSCDAPIF-UHFFFAOYSA-N thiopyran Chemical compound S1C=CC=C=C1 IBBLKSWSCDAPIF-UHFFFAOYSA-N 0.000 description 1
- YRHRIQCWCFGUEQ-UHFFFAOYSA-N thioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3SC2=C1 YRHRIQCWCFGUEQ-UHFFFAOYSA-N 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000010023 transfer printing Methods 0.000 description 1
- KWQNQSDKCINQQP-UHFFFAOYSA-K tri(quinolin-8-yloxy)gallane Chemical compound C1=CN=C2C(O[Ga](OC=3C4=NC=CC=C4C=CC=3)OC=3C4=NC=CC=C4C=CC=3)=CC=CC2=C1 KWQNQSDKCINQQP-UHFFFAOYSA-K 0.000 description 1
- 125000004306 triazinyl group Chemical group 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- 125000006617 triphenylamine group Chemical group 0.000 description 1
- 125000003960 triphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C3=CC=CC=C3C12)* 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
- HTPBWAPZAJWXKY-UHFFFAOYSA-L zinc;quinolin-8-olate Chemical compound [Zn+2].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 HTPBWAPZAJWXKY-UHFFFAOYSA-L 0.000 description 1
Images
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- H10K85/10—Organic polymers or oligomers
- H10K85/111—Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
- H10K85/115—Polyfluorene; Derivatives thereof
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- C07C211/54—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to two or three six-membered aromatic rings
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- C07C211/57—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings being part of condensed ring systems of the carbon skeleton
- C07C211/61—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings being part of condensed ring systems of the carbon skeleton with at least one of the condensed ring systems formed by three or more rings
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- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/56—Ring systems containing three or more rings
- C07D209/80—[b, c]- or [b, d]-condensed
- C07D209/82—Carbazoles; Hydrogenated carbazoles
- C07D209/86—Carbazoles; Hydrogenated carbazoles with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the ring system
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- C—CHEMISTRY; METALLURGY
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- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/56—Ring systems containing three or more rings
- C07D209/80—[b, c]- or [b, d]-condensed
- C07D209/82—Carbazoles; Hydrogenated carbazoles
- C07D209/88—Carbazoles; Hydrogenated carbazoles with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to carbon atoms of the ring system
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- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D307/91—Dibenzofurans; Hydrogenated dibenzofurans
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F12/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F12/02—Monomers containing only one unsaturated aliphatic radical
- C08F12/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F12/14—Monomers containing only one unsaturated aliphatic radical containing one ring substituted by hetero atoms or groups containing heteroatoms
- C08F12/26—Nitrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F12/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F12/02—Monomers containing only one unsaturated aliphatic radical
- C08F12/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F12/14—Monomers containing only one unsaturated aliphatic radical containing one ring substituted by hetero atoms or groups containing heteroatoms
- C08F12/26—Nitrogen
- C08F12/28—Amines
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F12/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F12/02—Monomers containing only one unsaturated aliphatic radical
- C08F12/32—Monomers containing only one unsaturated aliphatic radical containing two or more rings
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/18—Homopolymers or copolymers of aromatic monomers containing elements other than carbon and hydrogen
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/10—Organic polymers or oligomers
- H10K85/111—Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
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- H10K85/151—Copolymers
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2603/00—Systems containing at least three condensed rings
- C07C2603/02—Ortho- or ortho- and peri-condensed systems
- C07C2603/04—Ortho- or ortho- and peri-condensed systems containing three rings
- C07C2603/06—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members
- C07C2603/10—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members containing five-membered rings
- C07C2603/12—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members containing five-membered rings only one five-membered ring
- C07C2603/18—Fluorenes; Hydrogenated fluorenes
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- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2603/00—Systems containing at least three condensed rings
- C07C2603/93—Spiro compounds
- C07C2603/94—Spiro compounds containing "free" spiro atoms
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- C07—ORGANIC CHEMISTRY
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- C07C2603/00—Systems containing at least three condensed rings
- C07C2603/93—Spiro compounds
- C07C2603/95—Spiro compounds containing "not free" spiro atoms
- C07C2603/96—Spiro compounds containing "not free" spiro atoms containing at least one ring with less than six members
- C07C2603/97—Spiro compounds containing "not free" spiro atoms containing at least one ring with less than six members containing five-membered rings
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/14—Carrier transporting layers
- H10K50/15—Hole transporting layers
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/17—Carrier injection layers
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
Definitions
- the present specification relates to a polymer, a coating composition including the same, and an organic light emitting device formed using the same.
- An organic light emission phenomenon is one of examples converting a current to visible light by an internal process of specific organic molecules.
- a principle of an organic light emission phenomenon is as follows. When an organic material layer is placed between an anode and a cathode and a current is applied between the two electrodes, electrons and holes are injected to the organic material layer from the cathode and the anode, respectively. The holes and the electrons injected to the organic material layer recombine to form excitons, and light emits when these excitons fall back to the ground state.
- An organic electroluminescent device using such a principle may be generally formed with a cathode, an anode, and an organic material layer placed therebetween, for example, an organic material layer including a hole injection layer, a hole transfer layer, a light emitting layer, an electron transfer layer and an electron injection layer.
- Materials used in an organic light emitting device are mostly pure organic materials or complex compounds in which organic materials and metals form complexes, and may be divided into hole injection materials, hole transfer materials, light emitting materials, electron transfer materials, electron injection materials and the like depending on the application.
- organic materials having a p-type property that is, organic materials readily oxidized and having an electrochemically stable state when oxidized
- organic materials having an n-type property that is, organic materials readily reduced and having an electrochemically stable state when reduced, are generally used.
- materials having both a p-type property and an n-type property that is, materials having a stable form in both oxidized and reduced states, are preferred, and materials having high light emission efficiency converting, when excitons are formed, the excitons to light are preferred.
- materials used in an organic light emitting device additionally have properties as follows.
- materials used in an organic light emitting device preferably have excellent thermal stability. This is due to joule heating produced by charge migration in the organic light emitting device.
- N,N′-di(1-naphthyl)-N,N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine (NPB) normally used as a hole transfer layer material currently has a glass transition temperature of 100° C. or lower, and has a problem in that it is difficult to use in organic light emitting devices requiring a high current.
- Poly(3,4-ethylenedioxythiophene) doped:poly(styrenesulfonic acid) (PEDOT:PSS) currently used as a hole transfer material in an organic light emitting device manufactured using a solution coating method has a lower LUMO energy level compared to a LUMO energy level of organic materials used as a light emitting layer material, and therefore, has a problem in manufacturing an organic light emitting device with high efficiency and long lifetime.
- materials used in an organic light emitting device need to have excellent chemical stability, charge mobility, and interface property with electrodes or adjacent layers.
- materials used in an organic light emitting device need to undergo less material deformation caused by moisture or oxygen.
- the materials need to maximize exciton formation through balancing hole and electron density in a light emitting layer of the organic light emitting device.
- the materials also need to improve an interface with electrodes including metals or metal oxides.
- materials used in an organic light emitting device for a solution process additionally need to have properties as follows.
- a storable homogeneous solution needs to be formed.
- Commercialized materials for a deposition process have favorable crystallinity, so are not well-dissolved in a solution, or crystals are readily caught when forming a solution. Therefore, a concentration gradient of the solution may change depending on the storage time or possibility of forming a defective device is high.
- layers going through a solution process need to have solvent and material tolerance for other layers.
- materials capable of forming a self-crosslinked polymer on a substrate through heat treatment or ultraviolet (UV) irradiation after introducing a curing group and solution coating such as N4,N4′-di(naphthalen-1-yl)-N4,N4′-bis(4-vinylphenyl)biphenyl-4,4′-diamine (VNPB) or forming a polymer having sufficient tolerance for a next process are preferred, and materials capable of having solvent tolerance by itself such as hexaazatriphenylene hexacarbonitrile (HATCN) are also preferred.
- UV ultraviolet
- Arylamine-based monomers generally used in an organic light emitting device (OLED) do not have tolerance for a solvent of a next process by themselves, and therefore, arylamine-based monomer compounds usable in an OLED for a solution process need to have a curing group introduced thereto.
- the present specification is directed to providing a polymer, a coating composition including the same, and an organic light emitting device formed using the same.
- One embodiment of the present specification provides a polymer including a unit represented by the following Chemical Formula 1.
- L1 is a direct bond; a substituted or unsubstituted phenylene group; a substituted or unsubstituted naphthylene group; a substituted or unsubstituted biphenylene group; a substituted or unsubstituted divalent fluorenyl group; or a substituted or unsubstituted divalent carbazolyl group,
- l1 is an integer of 1 to 10
- Ar1 and Ar2 are the same as or different from each other, and each independently a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group,
- R1 to R8 are the same as or different from each other, and each independently hydrogen; deuterium; a halogen group; a hydroxyl group; a cyano group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted cycloalkyl group; a substituted or unsubstituted alkoxy group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group,
- r4, r6 and r8 are each an integer of 1 to 4,
- r5 and r7 are each an integer of 1 to 3
- the two or more Lis are the same as or different from each other, and
- n is, as a repetition number of the unit, an integer of 1 to 10,000.
- Another embodiment of the present specification provides a monomer represented by the following Chemical Formula 2.
- L1 is a direct bond; a substituted or unsubstituted phenylene group; a substituted or unsubstituted naphthylene group; a substituted or unsubstituted biphenylene group; a substituted or unsubstituted divalent fluorenyl group; or a substituted or unsubstituted divalent carbazolyl group,
- l1 is an integer of 1 to 10
- Ar1 and Ar2 are the same as or different from each other, and each independently a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group,
- R1 to R8 are the same as or different from each other, and each independently hydrogen; deuterium; a halogen group; a hydroxyl group; a cyano group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted cycloalkyl group; a substituted or unsubstituted alkoxy group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group,
- r4, r6 and r8 are each independently an integer of 1 to 4,
- r5 and r7 are each independently an integer of 1 to 3,
- the two or more Lis are the same as or different from each other.
- Another embodiment of the present specification provides a coating composition including the polymer including the unit represented by Chemical Formula 1.
- Another embodiment of the present specification provides a coating composition including the monomer represented by Chemical Formula 2.
- One embodiment of the present specification provides an organic light emitting device including a first electrode; a second electrode provided opposite to the first electrode; and one or more organic material layers provided between the first electrode and the second electrode, wherein one or more layers of the organic material layers include the polymer including the unit represented by Chemical Formula 1.
- one embodiment of the present disclosure provides a method for manufacturing an organic light emitting device, the method including preparing a first electrode; forming one or more organic material layers on the first electrode; and forming a second electrode on the organic material layer, wherein the forming of one or more organic material layers includes forming an organic material layer using the coating composition including the polymer including the unit represented by Chemical Formula 1 described above or the coating composition including the monomer represented by Chemical Formula 2 described above, and the forming of an organic material layer using the coating composition includes coating the coating composition on the first electrode; and heat treating or light treating the coated coating composition.
- An organic material layer formed using a polymer including a unit represented by Chemical Formula 1 according to one embodiment of the present specification has very low solubility for some solvents, and therefore, a lamination process can be conducted on the organic material layer formed using the polymer through a solution process.
- the polymer including the unit represented by Chemical Formula 1 has a high glass transition temperature due to specificity of the spirobifluorene structure, and in addition thereto, has low crystallinity due to low n-n stacking, and has excellent solubility for solvents.
- the polymer according to one embodiment of the present specification can be used as a material of an organic material layer of an organic light emitting device to lower a driving voltage of the organic light emitting device.
- the polymer according to one embodiment of the present specification can be used as a material of an organic material layer of an organic light emitting device to enhance light efficiency.
- the polymer according to one embodiment of the present specification can be used as a material of an organic material layer of an organic light emitting device to enhance lifetime properties of the device.
- FIG. 1 illustrates an example of an organic light emitting device according to one embodiment of the present specification.
- FIG. 2 is a diagram presenting LC-MS data of Monomer 1.
- FIG. 3 is a diagram presenting an HPLC analysis graph of Monomer 1.
- FIG. 4 is a diagram presenting LC-MS data of Monomer 2.
- FIG. 5 is a diagram presenting an HPLC analysis graph of Monomer 2.
- One embodiment of the present specification provides a polymer including a unit represented by Chemical Formula 1.
- One embodiment of the present specification also provides a monomer represented by Chemical Formula 2.
- the polymer including the unit represented by Chemical Formula 1 is a random polymer or a block polymer.
- a “unit” is a structure of a monomer being included and repeated in a polymer, and means a structure of a monomer bonding in a polymer by polymerization.
- the meaning of “including a unit” means the corresponding unit being included in a main chain in a polymer.
- the “monomer” means a monomer or a unit structure becoming a unit forming the polymer.
- the unit represented by Chemical Formula 1 includes spirobifluorene, and thereby minimizes steric hindrance compared to units including fluorene or carbazole used in the art, and as a result, a degree of curing of a polymer including the same may increase.
- the polymer including the unit represented by Chemical Formula 1 has solvent tolerance (solvent orthogonality) for some solvents, and therefore, other organic material layers may be formed on the organic material layer formed using the polymer including the unit represented by Chemical Formula 1 using a solution process.
- the prepared hole transfer layer, hole injection layer, or layer carrying out hole transfer and injection at the same time has excellent uniformity and surface properties as well, and therefore, device performance and lifetime properties may be enhanced.
- the polymer including the unit represented by Chemical Formula 1 may have its molecular weight readily controlled compared to monomolecular compounds including spirobifluorene, and viscosity of a solution including the same may also be readily controlled.
- An organic material layer may be formed using a solution process when using the polymer according to one embodiment of the present specification.
- the polymer including the unit represented by Chemical Formula 1 according to the present disclosure may be dissolved in solvents such as tetrahydrofuran (THF); or toluene, however, the solvent is not limited thereto.
- the polymer including the unit represented by Chemical Formula 1 has solvent orthogonality for solvents such as cycloketone; cycloalkane; or dioxane.
- the organic material layer including the polymer including the unit represented by Chemical Formula 1 has solubility of 0.05 wt % or less for cyclohexanone.
- the organic material layer including the polymer including the unit represented by Chemical Formula 1 has solubility of 0.05 wt % or less for dioxane.
- the organic material layer including the polymer including the unit represented by Chemical Formula 1 has solubility of 0.05 wt % or less for cyclohexane. In one embodiment, the organic material layer including the polymer including the unit represented by Chemical Formula has solubility of 0 wt % or greater for cyclohexane; cyclohexanone; or dioxane.
- whether the organic material layer is dissolved in a specific solvent may be identified by immersing the corresponding organic material layer in a solvent to measure the solubility, taking out the organic material layer, and measuring a difference in the UV absorption values of the organic material layer before and after being exposed to the specific solvent.
- the organic material layer exposed to the solvent may have a form of a single layer of the organic material layer, or may be a laminate having a form of providing the corresponding organic material layer on an outermost layer.
- a laminate having a form of providing the organic material layer on an outermost layer means, in a laminate in which two or more layers are consecutively laminated, a structure having a form of providing the corresponding organic material layer as the last layer in a laminated direction of the layers.
- b/a*100 is 97% or greater.
- b/a*100 is greater than or equal to 97% and less than or equal to 100%, it may be understood to have solvent orthogonality for the specific solvent.
- materials forming a specific organic material layer of an organic light emitting device may be analyzed through MS and NMR analyses after extracting the corresponding organic material layer from the organic light emitting device.
- solubility of the organic material layer for cyclohexanone is 0.05 wt % or less.
- solubility of the organic material layer for dioxane is 0.05 wt % or less.
- solubility of the organic material layer for cyclohexane is 0.05 wt % or less.
- a description of a certain member being placed “on” another member includes not only a case of the one member adjoining the another member but a case of still another member being present between the two members.
- substitution means a hydrogen atom bonding to a carbon atom of a compound is changed to another substituent.
- the position of substitution is not limited as long as it is a position at which the hydrogen atom is substituted, that is, a position at which a substituent can substitute, and when two or more substituents substitute, the two or more substituents may be the same as or different from each other.
- substituted or unsubstituted in the present specification means being substituted with one or more substituents selected from the group consisting of deuterium; a halogen group; a hydroxyl group; a cyano group; an alkyl group; a cycloalkyl group; an alkenyl group; an alkoxy group; an aryloxy group; an amine group; an aryl group; and a heteroaryl group, or being substituted with a substituent linking two or more substituents among the substituents illustrated above, or having no substituents.
- a substituent linking two or more substituents may include a biphenyl group.
- a biphenyl group may be an aryl group, or interpreted as a substituent linking two phenyl groups.
- examples of the halogen group may include fluorine, chlorine, bromine or iodine.
- the alkyl group may be linear or branched, and although not particularly limited thereto, the number of carbon atoms is preferably from 1 to 30.
- Specific examples thereof may include methyl, ethyl, propyl, n-propyl, isopropyl, butyl, n-butyl, isobutyl, tert-butyl, sec-butyl, 1-methyl-butyl, 1-ethyl-butyl, pentyl, n-pentyl, isopentyl, neopentyl, tert-pentyl, hexyl, n-hexyl, 1-methylpentyl, 2-methylpentyl, 3,3-dimethylbutyl, 2-ethylbutyl, heptyl, n-heptyl, 1-methylhexyl, cyclopentylmethyl, cyclohexylmethyl, octyl, n-octyl, tert-octyl, 1-methylheptyl, 2-ethylhexyl, 2-propylpentyl, n
- the cycloalkyl group is not particularly limited, but preferably has 3 to 30 carbon atoms, and specific examples thereof may include cyclopropyl, cyclobutyl, cyclopentyl, 3-methylcyclopentyl, 2,3-dimethylcyclopentyl, cyclohexyl, 3-methylcyclohexyl, 4-methylcyclohexyl, 2,3-dimethylcyclohexyl, 3,4,5-trimethylcyclohexyl, 4-tert-butylcyclohexyl, cycloheptyl, cyclooctyl and the like, but are not limited thereto.
- the alkenyl group may be linear or branched, and although not particularly limited thereto, the number of carbon atoms is preferably from 2 to 30. Specific examples thereof may include vinyl, 1-propenyl, isopropenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 3-methyl-1-butenyl, 1,3-butadienyl, allyl, 1-phenylvinyl-1-yl, 2-phenylvinyl-1-yl, 2,2-diphenylvinyl-1-yl, 2-phenyl-2-(naphthyl-1-yl)vinyl-1-yl, 2,2-bis(diphenyl-1-yl)vinyl-1-yl, a stilbenyl group, a styrenyl group and the like, but are not limited thereto.
- the alkoxy group may be linear, branched or cyclic.
- the number of carbon atoms of the alkoxy group is not particularly limited, but is preferably from 1 to 30. Specific examples thereof may include methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy, tert-butoxy, sec-butoxy, n-pentyloxy, neopentyloxy, isopentyloxy, n-hexyloxy, 3,3-dimethylbutyloxy, 2-ethylbutyloxy, n-octyloxy, n-nonyloxy, n-decyloxy, benzyloxy, p-methylbenzyloxy and the like, but are not limited thereto.
- the aryl group is not particularly limited, but preferably has 6 to 30 carbon atoms, and the aryl group may be monocyclic or polycyclic.
- the aryl group is a monocyclic aryl group
- the number of carbon atoms is not particularly limited, but is preferably from 6 to 30.
- Specific examples of the monocyclic aryl group may include a phenyl group, a biphenyl group, a terphenyl group and the like, but are not limited thereto.
- the number of carbon atoms is not particularly limited, but is preferably from 10 to 30.
- Specific examples of the polycyclic aryl group may include a naphthyl group, an anthracenyl group, a phenanthrenyl group, a triphenylenyl group, a pyrenyl group, a phenalenyl group, a perylenyl group, a chrysenyl group, a fluorenyl group and the like, but are not limited thereto.
- the fluorenyl group may be substituted, and adjacent groups may bond to each other to form a ring.
- the substituted fluorenyl group may be, for example, any one selected from among the following compounds, but is not limited thereto.
- the “adjacent” group may mean a substituent substituting an atom directly linked to an atom substituted by the corresponding substituent, a substituent sterically most closely positioned to the corresponding substituent, or another substituent substituting an atom substituted by the corresponding substituent.
- two substituents substituting ortho positions in a benzene ring, and two substituents substituting the same carbon in an aliphatic ring may be interpreted as groups “adjacent” to each other.
- the heteroaryl group includes one or more atoms that are not carbon, that is, heteroatoms, and specifically, the heteroatom may include one or more atoms selected from the group consisting of O, N, Se and S.
- the number of carbon atoms is not particularly limited, but is preferably from 2 to 30, and the heteroaryl group may be monocyclic or polycyclic.
- heterocyclic group may include a thiophenyl group, a furanyl group, a pyrrolyl group, an imidazolyl group, a triazolyl group, an oxazolyl group, an oxadiazolyl group, a pyridinyl group, a bipyridinyl group, a pyrimidinyl group, a triazinyl group, a triazolyl group, an acridinyl group, a pyridazinyl group, a pyrazinyl group, a quinolinyl group, a quinazolinyl group, a quinoxalinyl group, a phthalazinyl group, a pyridopyrimidinyl group, a pyridopyrazinyl group, a pyrazinopyrazinyl group, an isoquinolinyl group, an indolyl group, a carbazolyl group,
- the aryl group in the aryloxy group is the same as the examples of the aryl group described above.
- Specific examples of the aryloxy group may include a phenoxy group, a p-tolyloxy group, an m-tolyloxy group, a 3,5-dimethyl-phenoxy group, a 2,4,6-trimethylphenoxy group, a p-tert-butylphenoxy group, a 3-biphenyloxy group, a 4-biphenyloxy group, a 1-naphthyloxy group, a 2-naphthyloxy group, a 4-methyl-1-naphthyloxy group, a 5-methyl-2-naphthyloxy group, a 1-anthracenyloxy group, a 2-anthracenyloxy group, a 9-anthryloxy group, a 1-phenanthrenyloxy group, a 3-phenanthrenyloxy group, a 9-phenanthrenyloxy group
- the amine group may be selected from the group consisting of —NH 2 , an alkylamine group, an N-alkylarylamine group, an arylamine group, an N-arylheteroarylamine group, an N-alkylheteroarylamine group and a heteroarylamine group, and although not particularly limited thereto, the number of carbon atoms is preferably from 1 to 30.
- the amine group may include a methylamine group, a dimethylamine group, an ethylamine group, a diethylamine group, a phenylamine group, a naphthylamine group, a biphenylamine group, an anthracenylamine group, a 9-methyl-anthracenylamine group, a diphenylamine group, a ditolylamine group, an N-phenyltolylamine group, a triphenylamine group, an N-phenylbiphenylamine group, an N-phenylnaphthylamine group, an N-biphenylnaphthylamine group, an N-naphthylfluorenylamine group, an N-phenylphenanthrenylamine group, an N-biphenylphenanthrenylamine group, an N-phenylfluorenylamine group, an N-phenylterphenylamine group
- the N-alkylarylamine group means an amine group in which N of the amine group is substituted with an alkyl group and an aryl group.
- the alkyl group and the aryl group in the N-alkylarylamine group are the same as the examples of the alkyl group and the aryl group described above.
- the N-arylheteroarylamine group means an amine group in which N of the amine group is substituted with an aryl group and a heteroaryl group.
- the aryl group and the heteroaryl in the N-arylheteroarylamine group are the same as the examples of the aryl group and the heteroaryl group described above.
- the N-alkylheteroarylamine group means an amine group in which N of the amine group is substituted with an alkyl group and a heteroaryl group.
- the alkyl group and the heteroaryl in the N-alkylheteroarylamine group are the same as the examples of the alkyl group and the heteroaryl group described above.
- examples of the alkylamine group include a substituted or unsubstituted monoalkylamine group, or a substituted or unsubstituted dialkylamine group.
- the alkyl group in the alkylamine group may be a linear or branched alkyl group.
- the alkylamine group including two or more alkyl groups may include linear alkyl groups, branched alkyl groups, or both linear alkyl groups and branched alkyl groups.
- the alkyl group in the alkylamine group may be selected from among the examples of the alkyl group described above.
- examples of the arylamine group include a substituted or unsubstituted arylamine group, or a substituted or unsubstituted diarylamine group.
- the diarylamine group may include monocyclic aryl groups, polycyclic aryl groups, or both a monocyclic aryl group and a polycyclic aryl group.
- the aryl group in the arylamine group may be selected from among the examples of the aryl group described above.
- examples of the heteroarylamine group include a substituted or unsubstituted monoheteroarylamine group, or a substituted or unsubstituted diheteroarylamine group.
- the diheteroarylamine group may include monocyclic heteroaryl groups, polycyclic heteroaryl groups, or both a monocyclic heteroaryl group and a polycyclic heteroaryl group.
- the heteroaryl group in the heteroarylamine group may be selected from among the examples of the heteroaryl group described above.
- the arylene group means an aryl group having two bonding sites, that is, a divalent group. Descriptions on the aryl group provided above may be applied thereto except for those that are each divalent.
- the heteroarylene group means a heteroaryl group having two bonding sites, that is, a divalent group. Descriptions on the heteroaryl group provided above may be applied thereto except for those that are each divalent.
- R1 to R8 are hydrogen.
- the unit represented by Chemical Formula 1 is represented by the following Chemical Formula 1-1.
- L1, l1, Ar1, Ar2 and n have the same definitions as in Chemical Formula 1.
- Chemical Formula 1 is represented by the following Chemical Formula 1-2.
- L1, l1, Ar1, Ar2, n, R1 to R8 and r4 to r8 have the same definitions as in Chemical Formula 1.
- Chemical Formula 1 is represented by the following Chemical Formula 1-3.
- L1, l1, Ar1, Ar2, n, R1 to R8 and r4 to r8 have the same definitions as in Chemical Formula 1.
- Chemical Formula 1 is represented by the following Chemical Formula 1-4.
- L1, l1, Ar1, Ar2, n, R1 to R8 and r4 to r8 have the same definitions as in Chemical Formula 1.
- Chemical Formula 2 is represented by the following Chemical Formula 2-2.
- L1, l1, Ar1, Ar2, n, R1 to R8 and r4 to r8 have the same definitions as in Chemical Formula 2.
- Chemical Formula 2 is represented by the following Chemical Formula 2-3.
- L1, l1, Ar1, Ar2, n, R1 to R8 and r4 to r8 have the same definitions as in Chemical Formula 2.
- Chemical Formula 2 is represented by the following Chemical Formula 2-4.
- L1, l1, Ar1, Ar2, n, R1 to R8 and r4 to r8 have the same definitions as in Chemical Formula 2.
- L1 is a direct bond; a phenylene group unsubstituted or substituted with an alkyl group; a naphthylene group; a biphenylene group; a divalent fluorenyl group unsubstituted or substituted with an alkyl group; or a divalent carbazolyl group unsubstituted or substituted with an aryl group.
- L1 is a direct bond; a phenylene group unsubstituted or substituted with a methyl group; a naphthylene group; a biphenylene group; a divalent fluorenyl group unsubstituted or substituted with a methyl group; or a divalent carbazolyl group unsubstituted or substituted with a phenyl group.
- L1 is a direct bond, or any one selected from among the following structures.
- R is an aryl group
- R′ and R′′ are the same as or different from each other, and each independently hydrogen; or an alkyl group,
- the structures may be further substituted with an alkyl group.
- R is a phenyl group.
- R′ and R′′ are the same as or different from each other, and each independently hydrogen; or a methyl group.
- R′ and R′′ are hydrogen.
- R′ and R′′ are a methyl group.
- L1 is a direct bond, or any one selected from among the following structures, and the following structures may be further substituted with an alkyl group.
- L1 is any one selected from among the following structures, and the following structures may be further substituted with an alkyl group.
- Lis are linked in a series structure.
- L1 is a divalent carbazolyl group; or a phenylene group, and l1 is 2, the structure may be
- Lis are linked in a series structure.
- L1 is a divalent carbazolyl group; or a phenylene group, and l1 is 3, the structure may be
- l1 is an integer of 1 to 4.
- l1 is an integer of 1 to 3.
- l1 is 1.
- l1 is 2.
- l1 is 3.
- Ar1 and Ar2 are the same as or different from each other, and each independently an aryl group unsubstituted or substituted with an aryl group; an aryl group substituted with a heteroaryl group; an aryl group substituted with an alkyl group; an aryl group substituted with an aryl group substituted with an alkyl group; an aryl group substituted with a heteroaryl group substituted with an aryl group; or a heteroaryl group unsubstituted or substituted with an aryl group.
- Ar1 and Ar2 are the same as or different from each other, and each independently a phenyl group unsubstituted or substituted with an aryl group; a biphenyl group; a phenyl group substituted with a heteroaryl group; a fluorenyl group substituted with an alkyl group; a phenyl group substituted with an aryl group substituted with an alkyl group; a phenyl group substituted with a heteroaryl group substituted with an aryl group; a carbazolyl group unsubstituted or substituted with an aryl group; or a spirobifluorenyl group.
- Ar1 and Ar2 are the same as or different from each other, and each independently a phenyl group unsubstituted or substituted with a phenyl group; a biphenyl group; a phenyl group substituted with a dibenzofuranyl group; a phenyl group substituted with a dimethylfluorenyl group; a fluorenyl group substituted with a methyl group; a phenyl group substituted with a fluorenyl group substituted with a methyl group; a phenyl group substituted with a carbazolyl group substituted with a phenyl group; a carbazolyl group unsubstituted or substituted with a phenyl group; or a spirobifluorenyl group.
- Ar1 and Ar2 are the same as or different from each other, and each independently a phenyl group; a biphenyl group; a 9,9-dimethylfluorenyl group; a 9-phenylcarbazolyl group; a phenyl group substituted with a 9-phenylcarbazolyl group; a phenyl group substituted with a dibenzofuranyl group; or a 9,9′-spirobifluorenyl group.
- the unit represented by Chemical Formula 1 is selected from among the following structures.
- n is, as a repetition number of the unit, an integer of 1 to 10,000.
- the polymer including the unit represented by Chemical Formula 1 is a polymer formed with 100 mol % of the unit represented by Chemical Formula 1.
- the polymer including the unit represented by Chemical Formula 1 is a polymer in which the unit represented by Chemical Formula 1 is arranged linearly.
- an end group of the polymer may be hydrogen.
- the polymer may have a number average molecular weight of 5,000 g/mol to 1,000,000 g/mol. Specifically, the number average molecular weight may be from 5,000 g/mol to 300,000 g/mol.
- n is, as a repetition number, an integer of 4 to 200.
- n is, as a repetition number, an integer of 4 to 150.
- n is, as a repetition number, an integer of 4 to 100.
- the polymer may have molecular weight distribution of 1 to 10.
- the polymer has molecular weight distribution of 1 to 3.
- the molecular weight measures a number average molecular weight (Mn) and a weight average molecular weight (Mw) using GPC with chlorobenzene as a solvent, and the molecular weight distribution means a number dividing the weight average molecular weight (Mw) by the number average molecular weight (Mn), that is, weight average molecular weight (Mw)/number average molecular weight (Mn).
- the molecular weight is analyzed using a GPC apparatus.
- PL mixed Bx2 is used, and as the solvent, tetrahydrofuran (THF) (filtered with 0.45 ⁇ m when used).
- THF tetrahydrofuran
- a flow rate of 1.0 mL/min and a sample concentration of 1 mg/mL are used in the measurement.
- 100 ⁇ L of the sample is injected, and the column temperature is set at 40° C.
- the detector an Agilent RI detector is used, and the standard is set using polystyrene (PS). Data processing is conducted through the ChemStation program.
- PS polystyrene
- One embodiment of the present specification provides a coating composition including the polymer including the unit represented by Chemical Formula 1.
- One embodiment of the present specification provides a coating composition including the monomer represented by Chemical Formula 2.
- the coating composition including the polymer including the unit represented by Chemical Formula 1 may further include a solvent.
- the coating composition including the monomer represented by Chemical Formula 2 may further include a solvent.
- the coating composition including the polymer including the unit represented by Chemical Formula 1 may be a liquid phase. In one embodiment of the present specification, the coating composition including the monomer represented by Chemical
- Formula 2 may be a liquid phase.
- the “liquid phase” means in a liquid state at room temperature and atmospheric pressure.
- examples of the solvent may include chlorine-based solvents such as chloroform, methylene chloride, 1,2-dichloroethane, 1,1,2-trichloroethane, chlorobenzene and o-dichlorobenzene; ether-based solvents such as tetrahydrofuran and dioxane; aromatic hydrocarbon-based solvents such as toluene, xylene, trimethylbenzene and mesitylene; aliphatic hydrocarbon-based solvents such as cyclohexane, methylcyclohexane, n-pentane, n-hexane, n-heptane, n-octane, n-nonane and n-decane; ketone-based solvents such as acetone, methyl ethyl ketone and cyclohexanone; ester-based solvents such as ethyl acetate, butyl acetate
- the solvent may be used either alone as one type, or as a mixture mixing two or more solvent types.
- the solvent preferably has a boiling point of 40° C. to 250° C. and more preferably 60° C. to 230° C., however, the boiling point is not limited thereto.
- viscosity of the single or mixed solvent is preferably from 1 CP to 10 CP and more preferably from 3 CP to 8 CP, but is not limited thereto.
- Chemical Formula 2 are the same as or different from each other, and each independently from 0.1 wt/v % to 20 wt/v %, and more preferably from 0.5 wt/v % to 5 wt/v %, but are not limited thereto.
- the coating composition including the polymer including the unit represented by Chemical Formula 1; and the coating composition including the monomer represented by Chemical Formula 2 may each independently further include one, two or more types of additives selected from the group consisting of a thermal polymerization initiator and a photopolymerization initiator.
- the coating composition including the monomer represented by Chemical Formula 2 may further include a thermal polymerization initiator.
- thermal polymerization initiator may include peroxides such as methyl ethyl ketone peroxide, methyl isobutyl ketone peroxide, acetylacetone peroxide, methylcyclohexanone peroxide, cyclohexanone peroxide, isobutyryl peroxide, 2,4-dichlorobenzoyl peroxide, bis-3,5,5-trimethyl hexanoyl peroxide, lauryl peroxide, benzoyl peroxide, dicumyl peroxide, 2,5-dimethyl-2,5-(t-butyloxy)-hexane, 1,3-bis(t-butylperoxy-isopropyl)benzene, t-butyl cumyl peroxide, di-t-butyl peroxide, 2,5-dimethyl-2,5-(di-t-butylperoxy)hexane, tris-(t-butylperoxy)tri
- the photopolymerization initiator may include acetophenone-based or ketal-based photopolymerization initiators such as diethoxyacetophenone, 2,2-dimethoxy-1,2-diphenyl ethan-1-one, 1-hydroxy-cyclohexyl-phenyl-ketone, 4-(2-hydroxyethoxy)phenyl-(2-hydroxy-2-propyl)ketone, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butanone-1,2-hydroxy-2-methyl-1-phenylpropan-1-one, 2-methyl-2-morpholino(4-methylthiophenyl)propan-1-one and 1-phenyl-1,2-propanedion-2-(o-ethoxycarbonyl)oxime; benzoin ether-based photopolymerization initiators such as benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isobutyl ether and benzoin isopropy
- those having a photopolymerization facilitating effect may be used either alone or together with the photopolymerization initiator.
- examples thereof may include triethanolamine, methyldiethanolamine, ethyl 4-dimethylaminobenzoate, isoamyl 4-dimethylaminobenzoate, (2-dimethylamino)ethyl benzoate, 4,4′-dimethylaminobenzophenone and the like, but are not limited thereto.
- Another embodiment of the present specification provides an organic light emitting device formed using the coating composition.
- One embodiment of the present specification provides an organic light emitting device including a first electrode; a second electrode provided opposite to the first electrode; and one or more organic material layers provided between the first electrode and the second electrode, wherein one or more layers of the organic material layers include the polymer including the unit represented by Chemical Formula 1 described above.
- the organic light emitting device in one embodiment of the present specification includes a first electrode; a second electrode provided opposite to the first electrode; and one or more organic material layers provided between the first electrode and the second electrode, and one or more layers of the organic material layers are formed using the coating composition including the polymer including the unit represented by Chemical Formula 1.
- an organic light emitting device including a first electrode; a second electrode provided opposite to the first electrode; and one or more organic material layers provided between the first electrode and the second electrode, wherein one or more layers of the organic material layers include a cured material of the coating composition including the monomer represented by Chemical Formula 2 described above.
- the cured material of the coating composition including the monomer represented by Chemical Formula 2 may be in a cured state by heat treating or light treating the coating composition.
- the first electrode is a cathode
- the second electrode is an anode
- the first electrode is an anode
- the second electrode is a cathode
- the first electrode is an anode
- the second electrode is a cathode
- the one or more organic material layers include a light emitting layer
- the organic material layer including the polymer including the unit represented by Chemical Formula 1 is provided between the anode and the light emitting layer.
- the organic material layer including the polymer including the unit represented by Chemical Formula 1 is a hole transfer layer, a hole injection layer, or a layer carrying out hole transfer and hole injection at the same time.
- the organic material layer including the polymer including the unit represented by Chemical Formula 1 is a hole transfer layer.
- the organic material layer including the polymer including the unit represented by Chemical Formula 1 is a hole injection layer.
- the organic material layer including the polymer including the unit represented by Chemical Formula 1 is a layer carrying out hole transfer and hole injection at the same time.
- the organic material layer including a cured material of the coating composition including the monomer represented by Chemical Formula 2 is a hole transfer layer, a hole injection layer, or a layer carrying out hole transfer and hole injection at the same time.
- the organic material layer including a cured material of the coating composition including the monomer represented by Chemical Formula 2 is a hole transfer layer.
- the organic material layer including a cured material of the coating composition including the monomer represented by Chemical Formula 2 is a hole injection layer.
- the organic material layer including a cured material of the coating composition including the monomer represented by Chemical Formula 2 is a layer carrying out hole transfer and hole injection at the same time.
- the coating composition including the polymer including the unit represented by Chemical Formula 1; and the coating composition including the monomer represented by Chemical Formula 2 may each independently further include a p-doping material.
- the p-doping material includes at least one selected from the group consisting of F 4 TCNQ; and a boron anion.
- the boron anion includes a halogen group.
- the boron anion includes F.
- the p-doping material is one, two or more types selected from among the following structural formulae.
- the coating composition including the polymer including the unit represented by Chemical Formula 1 includes the p-doping material
- the polymer including the unit represented by Chemical Formula 1 and the p-doping material are included in the coating composition in a weight ratio of 99:1 to 70:30, and preferably in a weight ratio of 90:10 to 70:30.
- the coating composition including the monomer represented by Chemical Formula 2 includes the p-doping material
- the monomer represented by Chemical Formula 2 and the p-doping material are included in the coating composition in a weight ratio of 99:1 to 70:30, and preferably in a weight ratio of 90:10 to 70:30.
- the organic light emitting device may further include one, two or more layers selected from the group consisting of a hole injection layer, a hole transfer layer. a light emitting layer, an electron transfer layer, an electron injection layer, an electron blocking layer and a hole blocking layer.
- the organic light emitting device may be an organic light emitting device having a structure in a normal direction in which an anode, one or more organic material layers and a cathode are consecutively laminated on a substrate (normal type).
- the organic light emitting device may be an organic light emitting device having a structure in a reverse direction in which a cathode, one or more organic material layers and an anode are consecutively laminated on a substrate (inverted type).
- the organic material layer of the organic light emitting device of the present specification may be formed in a single layer structure, but may also be formed in a multilayer structure in which two or more organic material layers are laminated.
- the organic light emitting device of the present specification may have a structure including a hole injection layer, a hole transfer layer, a light emitting layer, an electron transfer layer, an electron injection layer and the like as the organic material layer.
- the structure of the organic light emitting device is not limited thereto, and may include a smaller or lager number of organic material layers.
- FIG. 1 a structure of the organic light emitting device according to one embodiment of the present specification is illustrated in FIG. 1 .
- FIG. 1 illustrates a structure of the organic light emitting device in which a first electrode ( 201 ), a hole injection layer ( 301 ), a hole transfer layer ( 401 ), a light emitting layer ( 501 ), an electron transfer layer ( 601 ) and a second electrode ( 701 ) are consecutively laminated on a substrate ( 101 ).
- a layer carrying out electron injection and transfer at the same time may be provided instead of the electron transfer layer ( 601 ).
- the hole injection layer ( 301 ), the hole transfer layer ( 401 ) or the light emitting layer ( 501 ) of FIG. 1 may be formed using the coating composition including the polymer including the unit represented by Chemical Formula 1.
- the hole injection layer ( 301 ) of FIG. 1 may be formed using the coating composition including the polymer including the unit represented by Chemical Formula 1.
- the hole transfer layer ( 401 ) of FIG. 1 may be formed using the coating composition including the polymer including the unit represented by Chemical Formula 1.
- FIG. 1 illustrates the organic light emitting device, however, the organic light emitting device is not limited thereto.
- the organic material layers may be formed with materials that are the same as or different from each other.
- the organic light emitting device of the present specification may be manufactured using materials and methods known in the art, except that one or more layers of the organic material layers are formed using the coating composition according to one embodiment of the present disclosure.
- the organic light emitting device of the present specification may be manufactured by consecutively laminating an anode, an organic material layer and a cathode on a substrate.
- the organic light emitting device may be manufactured by forming an anode on a substrate by depositing a metal, a metal oxide having conductivity, or an alloy thereof using a physical vapor deposition (PVD) method such as sputtering or e-beam evaporation, forming an organic material layer including a hole injection layer, a hole transfer layer, a light emitting layer and an electron transfer layer thereon, and then depositing a material capable of being used as a cathode thereon.
- PVD physical vapor deposition
- the organic light emitting device may also be manufactured by consecutively depositing a cathode material, an organic material layer and an anode material on a substrate.
- the coating composition means the coating composition including the polymer including the unit represented by Chemical Formula 1; or the coating composition including the monomer represented by Chemical Formula 2.
- one embodiment of the present specification provides a method for manufacturing an organic light emitting device, the method including preparing a first electrode; forming one or more organic material layers on the first electrode; and forming a second electrode on the organic material layer, wherein the forming of one or more organic material layers includes forming an organic material layer using the coating composition including the polymer including the unit represented by Chemical Formula 1 described above or the coating composition including the monomer represented by
- the forming of an organic material layer using the coating composition includes coating the coating composition on the first electrode; and heat treating or light treating the coated coating composition.
- the organic material layer formed using the coating composition is formed using spin coating or inkjetting.
- the organic material layer formed using the coating composition is formed using a printing method.
- examples of the printing method include inkjet printing, nozzle printing, offset printing, transfer printing, screen printing or the like, but are not limited thereto.
- the coating composition according to one embodiment of the present specification is suited for a solution process due to its structural properties and may be formed using a printing method, and therefore, is economically effective in terms of time and costs when manufacturing a device.
- the forming of an organic material layer using the coating composition includes coating the coating composition on the first electrode; and heat treating or light treating the coated coating composition.
- the time of the heat treating is preferably within 1 hour and more preferably within 30 minutes.
- the atmosphere of the heat treating is preferably inert gas such as argon or nitrogen.
- the heat treating or light treating of the coated coating composition may be removing a solvent from the coated coating composition.
- the heat treating or light treating of the coated coating composition may be removing a solvent while an alkenyl group of the monomer represented by Chemical Formula 2 participates in the polymerization and forms the polymer including the unit represented by Chemical Formula 1.
- an organic material layer including a structure in which the coating composition becomes a thin film may be provided.
- being dissolved by a solvent deposited on a surface of the organic material layer formed using the coating composition, or being morphologically influenced or decomposed may be prevented.
- the organic material layer formed using the coating composition has resistance for a specific solvent, and a multilayer may be formed by repeatedly performing a solution deposition method using the specific solvent.
- lifetime properties of a device may also be enhanced due to increased stability of the organic material layer.
- the coating composition including the polymer may use a coating composition mixed to a polymer binder and dispersed.
- the polymer binder those that do not extremely inhibit charge transfer are preferred, and those that do not have strong absorption for visible light are preferably used.
- the polymer binder may include poly(N-vinylcarbazole), polyaniline and derivatives thereof, polythiophene and derivatives thereof, poly(p-phenylenevinylene) and derivatives thereof, poly(2,5-thienylenevinylene) and derivatives thereof, polycarbonate, polyacrylate, polymethyl acrylate, polymethyl methacrylate, polystyrene, polyvinyl chloride, polysiloxane and the like.
- organic material layer may include the polymer including the unit represented by Chemical Formula 1 alone, but may also further include other monomers or other polymers.
- anode material materials having large work function are normally preferred so that hole injection to an organic material layer is smooth.
- anode material capable of being used in the present specification include metals such as vanadium, chromium, copper, zinc and gold, and alloys thereof; metal oxides such as zinc oxide, indium oxide, indium tin oxide (ITO) and indium zinc oxide (IZO); combinations of metals and oxides such as ZnO:Al or SnO 2 :Sb; conductive polymers such as poly(3-methylthiophene), poly[3,4-(ethylene-1,2-dioxy)thiophene] (PEDOT), polypyrrole and polyaniline, and the like, but are not limited thereto.
- the cathode material materials having small work function are normally preferred so that electron injection to an organic material layer is smooth.
- the cathode material include metals such as magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin and lead, or alloys thereof; multilayer structure materials such as LiF/Al or LiO 2 /Al, and the like, but are not limited thereto.
- the hole injection layer is a layer that injects holes from an electrode
- the hole injection material is preferably a compound that has an ability to transfer holes and thereby has a hole injection effect in an anode and an excellent hole injection effect for a light emitting layer or a light emitting material, prevents excitons generated in the light emitting layer from moving to an electron injection layer or an electron injection material, and in addition thereto, has an excellent thin film forming ability.
- the highest occupied molecular orbital (HOMO) of the hole injection material is preferably in between the work function of an anode material and the HOMO of surrounding organic material layers.
- the hole injection material examples include metal porphyrins, oligothiophene, arylamine-based organic materials, hexanitrile hexaazatriphenylene-based organic materials, quinacridone-based organic materials, perylene-based organic materials, anthraquinone, and polyaniline- and polythiophene-based conductive polymers, and the like, but are not limited thereto.
- the hole transfer layer is a layer that receives holes from a hole injection layer and transfers the holes to a light emitting layer, and, when the organic light emitting device includes an additional hole transfer layer in addition to the hole transfer layer including the polymer including the unit represented by Chemical Formula 1, materials capable of receiving holes from an anode or a hole injection layer, moving the holes to a light emitting layer, and having high mobility for the holes are suited as the hole transfer material.
- Specific examples thereof include arylamine-based organic materials, conductive polymers, block copolymers having conjugated parts and non-conjugated parts together, and the like, but are not limited thereto.
- the electron blocking layer is a layer capable of enhancing device lifetime and efficiency by preventing electrons injected from an electron injection layer from entering a hole injection layer after passing through a light emitting layer, and as necessary, may be formed in a proper part between the light emitting layer and the hole injection layer using known materials.
- the light emitting material is a material capable of emitting light in a visible light region by receiving holes and electrons from a hole transfer layer and an electron transfer layer, respectively, and binding the holes and the electrons, and is preferably a material having favorable quantum efficiency for fluorescence or phosphorescence.
- Alq 3 8-hydroxyquinoline aluminum complexes
- carbazole-based compounds dimerized styryl compounds
- BAlq 10-hydroxybenzoquinoline-metal compounds
- benzoxazole-, benzothiazole- and benzimidazole-based compounds poly(p-phenylenevinylene) (PPV)-based polymers
- spiro compounds polyfluorene, rubrene, or the like, but are not limited thereto.
- the light emitting layer may include a host material and a dopant material.
- the host material includes fused aromatic ring derivatives, heteroring-containing compounds or the like.
- the fused aromatic ring derivative includes anthracene derivatives, pyrene derivatives, naphthalene derivatives, pentacene derivatives, phenanthrene compounds, fluoranthene compounds and the like
- the heteroring-containing compound includes carbazole derivatives, dibenzofuran derivatives, ladder-type furan compounds, pyrimidine derivatives and the like, however, the material is not limited thereto.
- the dopant material includes aromatic amine derivatives, styrylamine compounds, boron complexes, fluoranthene compounds, metal complexes and the like.
- the aromatic amine derivative is a fused aromatic ring derivative having a substituted or unsubstituted arylamine group and includes arylamine group-including pyrene, anthracene, chrysene, peryflanthene and the like
- the styrylamine compound is a compound in which substituted or unsubstituted arylamine is substituted with at least one arylvinyl group, and compounds in which one, two or more substituents selected from the group consisting of an aryl group, a silyl group, an alkyl group, a cycloalkyl group and an arylamine group are substituted or unsubstituted may be used.
- styrylamine styryldiamine, styryltriamine, styryltetramine or the like is included, however, the styrylamine compound is not limited thereto.
- the metal complex includes iridium complexes, platinum complexes or the like, but is not limited thereto.
- the electron transfer layer is a layer that receives electrons from an electron injection layer and transfers the electrons to a light emitting layer
- materials capable of favorably receiving electrons from a cathode, moving the electrons to a light emitting layer, and having high mobility for the electrons are suited.
- Specific examples thereof include Al complexes of 8-hydroxyquinoline; complexes including Alq 3 ; organic radical compounds; hydroxyflavon-metal complexes, or the like, but are not limited thereto.
- the electron transfer layer may be used together with any desired cathode material as used in the art.
- the suitable cathode material include common materials that have small work function, and in which an aluminum layer or a silver layer follows.
- the cathode material includes cesium, barium, calcium, ytterbium and samarium, and in each case, an aluminum layer or a silver layer follows.
- the electron injection layer is a layer that injects electrons from an electrode
- the electron injection material is preferably a compound that has an ability to transfer electrons, has an electron injection effect from a cathode, has an excellent electron injection effect for a light emitting layer or a light emitting material, prevents excitons generated in the light emitting layer from moving to a hole injection layer, and in addition thereto, has an excellent thin film forming ability.
- fluorenone anthraquinodimethane, diphenoquinone, thiopyran dioxide, oxazole, oxadiazole, triazole, imidazole, perylene tetracarboxylic acid, fluorenylidene methane, anthrone or the like, and derivatives thereof, metal complex compounds, nitrogen-containing 5-membered ring derivatives, and the like, but are not limited there.
- the metal complex compound includes 8-hydroxyquinolinato lithium, bis(8-hydroxyquinolinato)zinc, bis(8-hydroxyquinolinato)copper, bis(8-hydroxyquinolinato)manganese, tris(8-hydroxyquinolinato)aluminum, tris(2-methyl-8-hydroxyquinolinato)aluminum, tris(8-hydroxyquinolinato)gallium, bis(10-hydroxybenzo[h]quinolinato)beryllium, bis(10-hydroxybenzo[h]quinolinato)zinc, bis(2-methyl-8-quinolinato)chlorogallium, bis(2-methyl-8-quinolinato) (o-cresolato)gallium, bis(2-methyl-8-quinolinato) (1-naphtholato)aluminum, bis(2-methyl-8-quinolinato) (2-naphtholato)gallium and the like, but is not limited thereto.
- the hole blocking layer is a layer blocking holes from reaching a cathode, and generally, may be formed under the same condition as the hole injection layer. Specifically, oxadiazole derivatives or triazole derivatives, phenanthroline derivatives, aluminum complexes and the like are included, however, the material is not limited thereto.
- the organic light emitting device may be a top-emission type, a bottom-emission type or a dual-emission type depending on the materials used.
- Monomer 4 was synthesized in the same manner as in the synthesis of Monomer 3 except that Compound 1-D was used instead of Compound 1-C, and Compound 2-D was used instead of Compound 2-C.
- Monomer 6 was synthesized in the same manner as in the synthesis of Monomer 5 except that Compound 1-F was used instead of Compound 2-E.
- Monomer 7 was synthesized in the same manner as in the synthesis of Monomer 5 except that Compound 1-G was used instead of Compound 2-E.
- Monomer 8 was synthesized in the same manner as in the synthesis of Monomer 5 except that Compound 1-H was used instead of Compound 2-E.
- Monomer 10 was synthesized in the same manner as in the synthesis of Monomer 9 except that Compound 1-J was used instead of Compound 1-I, and Compound 2-D was used instead of Compound 3-B.
- Monomer 11 was synthesized in the same manner as in the synthesis of Monomer 9 except that Compound 1-K was used instead of Compound 1-I, and Compound 3-K was used instead of Compound 3-B.
- Monomer 13 was synthesized in the same manner as in the synthesis of Monomer 12 except that Compound 1-M was used instead of Compound 1-L, and Compound 2-M was used instead of Compound 2-L.
- Polymers 2 to 15 were prepared in the same manner as the method for preparing Polymer 1 except that monomers of the following Table 1 were used instead of Monomer 1.
- Polymers P1 and P2 were prepared in the same manner as the method for preparing Polymer 1 except that monomers of the following Table 1 were used instead of Monomer 1.
- a glass substrate on which indium tin oxide (ITO) was coated as a thin film to a thickness of 150 nm was placed in detergent-dissolved distilled water and ultrasonic cleaned.
- ITO indium tin oxide
- a product of Fischer Co. was used as the detergent
- distilled water distilled water filtered twice with a filter manufactured by Millipore Co. was used.
- ultrasonic cleaning was repeated twice using distilled water for 10 minutes.
- the substrate was ultrasonic cleaned with solvents of isopropyl alcohol and acetone, then dried, cleaned for 5 minutes, and then transported to a glove box.
- a 2 wt/v % toluene coating composition of Polymer 1 and the following Compound M (weight ratio of 8:2) was spin coated (4000 rpm), and heat treated (cured) for 30 minutes at 200° C. to form a hole injection layer to a thickness of 40 nm.
- a hole transfer layer having a thickness of 20 nm was formed on the hole injection layer by vacuum depositing the following Compound G.
- a light emitting layer was formed by vacuum depositing the following Compound H and the following Compound I in a weight ratio of 92:8 to a thickness of 20 nm.
- an electron injection and transfer layer was formed by vacuum depositing the following Compound J to a thickness of 35 nm.
- LiF and aluminum were consecutively deposited to a thickness of 1 nm and a thickness of 100 nm, respectively, to form a cathode.
- the deposition rates of the organic materials were maintained at 0.04 nm/sec to 0.07 nm/sec, the deposition rates of the LiF and the aluminum were maintained at 0.03 nm/sec and 0.2 nm/sec, respectively, and the degree of vacuum during the deposition was maintained at 2 ⁇ 10 ⁇ 7 torr to 5 ⁇ 10 ⁇ 6 torr.
- An organic light emitting device of Comparative Example 1-1 was manufactured in the same manner as in Example 1-1 except that a polymer of the following Table 2 was used instead of Polymer 1.
- a glass substrate on which indium tin oxide (ITO) was coated as a thin film to a thickness of 150 nm was placed in detergent-dissolved distilled water and ultrasonic cleaned.
- ITO indium tin oxide
- a product of Fischer Co. was used as the detergent
- distilled water distilled water filtered twice with a filter manufactured by Millipore Co. was used.
- ultrasonic cleaning was repeated twice using distilled water for 10 minutes.
- the substrate was ultrasonic cleaned with solvents of isopropyl alcohol and acetone, then dried, cleaned for 5 minutes, and then transported to a glove box.
- a coating composition dissolving Compound K and Compound L (weight ratio of 8:2) in 2 wt/v % cyclohexanone was spin coated (4000 rpm), and heat treated (cured) for 30 minutes at 230° C. to form a hole injection layer to a thickness of 40 nm.
- a hole transfer layer having a thickness of 20 nm was formed by spin coating a composition dissolving Polymer 1 in toluene in 2 wt % and heat treating the result for 30 minutes at 230° C.
- a light emitting layer was formed to a thickness of 25 nm by spin coating (4000 rpm) a coating composition dissolving the following Compound H and the following Compound I in a weight ratio of 92:8 in 2 wt/v % cyclohexanone, and heat treating the result for 30 minutes at 150° C.
- an electron injection and transfer layer was formed on the light emitting layer by vacuum depositing the following Compound J to a thickness of 35 nm.
- LiF and aluminum were consecutively deposited to a thickness of 1 nm and a thickness of 100 nm, respectively, to form a cathode.
- the deposition rates of the organic materials were maintained at 0.04 nm/sec to 0.07 nm/sec, the deposition rates of the LiF and the aluminum were maintained at 0.03 nm/sec and 0.2 nm/sec, respectively, and the degree of vacuum during the deposition was maintained at 2 ⁇ 10 ⁇ 7 torr to 5 ⁇ 10 ⁇ 6 torr.
- Organic light emitting devices of Examples 2-2 to 2-13 were manufactured in the same manner as in Example 2-1 except that polymers of the following Table 2 were used instead of Polymer 1.
- Organic light emitting devices of Comparative Examples 2-1 and 2-2 were manufactured in the same manner as in Example 2-except that polymers of the following Table 2 were used instead of Polymer 1.
- An organic light emitting device of Comparative Example 2-3 was manufactured in the same manner as in Example 2-1 except that the following Compound P3 was used instead of Polymer 1 when forming the hole transfer layer of Example 2-1.
- Example 1-1 using a polymer including spirobifluorene in a hole injection layer had external quantum efficiency improved by approximately 38%, and a lifetime improved by approximately 216% compared to the device of Comparative Example 1-1 using a polymer that does not include spirobifluorene.
- the device of Example 2-1 using a polymer including spirobifluorene in a hole transfer layer had external quantum efficiency improved by approximately 15%, and a lifetime improved by approximately 190% or greater compared to the device of Comparative Example 2-1 using a polymer that does not include spirobifluorene.
- the polymer according to one embodiment of the present specification had excellent solubility for organic solvents, and a coating composition was readily prepared. From the results of Table 1, it was identified that a uniform coating layer was able to be formed using the coating composition and film stability was excellent as well, and as a result, more superior performance was obtained in the organic light emitting device.
- the polymer including the unit of Chemical Formula 1 according to one embodiment of the present disclosure had tolerance for a solvent such as cyclohexanone.
- forming an organic material layer with the polymer including the unit of Chemical Formula 1 according to one embodiment of the present disclosure has an advantage in that other organic material layers may be formed on the organic material layer using a solution process.
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